Home • About Us • A-Z Index • Search * Contact Us • Register • Login • Press • Shop

The Open Brand -- Problem Reporting and Interpretations System

Problem Report 0737 Details

Help Show help | Quick Search | Submit a Test Suite Support Request | Click here to view your privileges

This page provides all information on Problem Report 0737.

Report 0737 Actions

    Problem Report Number 0737
    Submitter's Classification Specification problem
    State Resolved
    Resolution Temporary Interpretation (TIN)
    Problem Resolution ID TIN.X.0028
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published 1995-11-01 08:00
    Product Standard Commands and Utilities V2 (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSC version 4.1.4
    Test Identification POSIX.cmd/find 74,75,76
    Specification Commands and Utilities Issue 4 Version 2
    Location in Spec See Problem Text
    Problem Summary TIN4C.00033 The tests may fail on implementations that adhere to POSIX.2b where the definition of n is one less than defined in POSIX.2.
    Problem Text
    The tests may fail on implementations that adhere to POSIX.2b
    where the definition of n is one less than defined in POSIX.2.

    The tests in question verify the following assertions:

    74:
    When find <path> -atime <n> is invoked, find recursively descends the
    directory hierarchy from each file specified by <path>. The -atime <n>
    primary evaluates to true only for those files examined in the
    directory hierarchy whose access time subtracted from the initialization
    time is between <n>-1 and <n> multiples of 24 hours.

    75:
    When find <path> -mtime <n> is invoked, find recursively descends the
    directory hierarchy from each file specified by <path>. The -mtime <n>
    primary evaluates to true only for those files examined in the
    directory hierarchy whose modification time subtracted from the
    initialization time is between <n>-1 and <n> multiples of 24 hours.

    76:
    When find <path> -ctime <n> is invoked, find recursively descends the
    directory hierarchy from each file specified by <path>. The -ctime <n>
    primary evaluates to true only for those files examined in the
    directory hierarchy whose time of last change of file status information
    time subtracted from the initialization time is between <n>-1 and <n>
    multiples of 24 hours.

    These assertions accurately restate the requirements of POSIX.2. However,
    POSIX.2 erred in its specification, which did not reflect the historic
    behavior of the find utility. This issue was specifically addressed
    in IEEE interpretation pasc-1003.2-058.

    In fact, the wording of POSIX.2 does not describe the historic behavior of
    the find utility. In the most recent draft (Draft 11) of POSIX.2b, the
    behavior of the -atime, -mtime and -ctime operands has been changed. The
    following is taken from POSIX 1003.2b Draft 11 p. 56:

    ----------------start of extract from POSIX.2b----------------
    -atime n The primary shall evaluate as true if the file access
    time subtracted from the initialization time, divided
    by 86400 (with any remainder discarded), is n.

    -ctime n The primary shall evaluate as true if the time of last
    change of file status information subtracted from the
    initialization time, divided by 86400 (with any remainder
    discarded), is n.

    -mtime n The primary shall evaluate as true if the file modification
    time subtracted from the initialization time, divided
    by 86400 (with any remainder discarded), is n.


    Rationale: This change is required to match historical practice and is
    the result of intrepretation request PASC 1003.2 #58 submitted for
    IEEE Std 1003.2-1992.
    -----------------end of extract from POSIX.2b-----------------

    In view of this changed specification, the requirements of these assertions
    clearly constitute a grey area.
    Test Output
    -----------------start of test output------------------

    ************************************************************************
    /tset/POSIX.cmd/find/find.ex 1 Failed


    Test Information:
    Assertion #74 (A): Option -atime
    Standard output isn't the same as file 'find0742.exp'
    diff of "out.stdout" and "find0742.exp":
    *** out.stdout Wed Sep 20 21:44:12 1995
    --- find0742.exp Wed Sep 20 21:43:42 1995
    ***************
    *** 0 ****
    --- 1 ----
    + df074.tmp/f1
    ************************************************************************


    ************************************************************************
    /tset/POSIX.cmd/find/find.ex 1 Failed

    Test Information:
    Assertion #75 (A): Option -mtime
    Standard output isn't the same as file 'find0752.exp'
    diff of "out.stdout" and "find0752.exp":
    *** out.stdout Wed Sep 20 21:44:45 1995
    --- find0752.exp Wed Sep 20 21:44:15 1995
    ***************
    *** 0 ****
    --- 1 ----
    + df075.tmp/f2
    ************************************************************************


    ************************************************************************
    /tset/POSIX.cmd/find/find.ex 1 Failed


    Test Information:
    Assertion #76 (A): Option -ctime
    "df076.tmp" wasn't found in standard output
    "df076.tmp/f1" wasn't found in standard output
    ************************************************************************

    ------------------end of test output-------------------

    Note: this output was from the vrpt report.

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    Anticipating acceptance of the modified find specification in POSIX
    2003.2b/D11 and the eventual alignment of the tests with it a
    temporary interpretation is recommended.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Temporary Interpretation (TIN)
    Review Conclusion
    A Temporary Interpretation is granted.

    Problem Reporting System Options:

     

    Back   

Contact the Certification Authority